xref: /linux/drivers/gpu/drm/nouveau/nvif/mmu.c (revision 34dc1baba215b826e454b8d19e4f24adbeb7d00d)
1 /*
2  * Copyright 2017 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  */
22 #include <nvif/mmu.h>
23 
24 #include <nvif/class.h>
25 #include <nvif/if0008.h>
26 
27 void
28 nvif_mmu_dtor(struct nvif_mmu *mmu)
29 {
30 	if (!nvif_object_constructed(&mmu->object))
31 		return;
32 
33 	kfree(mmu->kind);
34 	kfree(mmu->type);
35 	kfree(mmu->heap);
36 	nvif_object_dtor(&mmu->object);
37 }
38 
39 int
40 nvif_mmu_ctor(struct nvif_object *parent, const char *name, s32 oclass,
41 	      struct nvif_mmu *mmu)
42 {
43 	static const struct nvif_mclass mems[] = {
44 		{ NVIF_CLASS_MEM_GF100, -1 },
45 		{ NVIF_CLASS_MEM_NV50 , -1 },
46 		{ NVIF_CLASS_MEM_NV04 , -1 },
47 		{}
48 	};
49 	struct nvif_mmu_v0 args;
50 	int ret, i;
51 
52 	args.version = 0;
53 	mmu->heap = NULL;
54 	mmu->type = NULL;
55 	mmu->kind = NULL;
56 
57 	ret = nvif_object_ctor(parent, name ? name : "nvifMmu", 0, oclass,
58 			       &args, sizeof(args), &mmu->object);
59 	if (ret)
60 		goto done;
61 
62 	mmu->dmabits = args.dmabits;
63 	mmu->heap_nr = args.heap_nr;
64 	mmu->type_nr = args.type_nr;
65 	mmu->kind_nr = args.kind_nr;
66 
67 	ret = nvif_mclass(&mmu->object, mems);
68 	if (ret < 0)
69 		goto done;
70 	mmu->mem = mems[ret].oclass;
71 
72 	mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
73 				  GFP_KERNEL);
74 	mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
75 				  GFP_KERNEL);
76 	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
77 		goto done;
78 
79 	mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
80 				  GFP_KERNEL);
81 	if (!mmu->kind && mmu->kind_nr)
82 		goto done;
83 
84 	for (i = 0; i < mmu->heap_nr; i++) {
85 		struct nvif_mmu_heap_v0 args = { .index = i };
86 
87 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
88 				       &args, sizeof(args));
89 		if (ret)
90 			goto done;
91 
92 		mmu->heap[i].size = args.size;
93 	}
94 
95 	for (i = 0; i < mmu->type_nr; i++) {
96 		struct nvif_mmu_type_v0 args = { .index = i };
97 
98 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
99 				       &args, sizeof(args));
100 		if (ret)
101 			goto done;
102 
103 		mmu->type[i].type = 0;
104 		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
105 		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
106 		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
107 		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
108 		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
109 		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
110 		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
111 		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
112 		mmu->type[i].heap = args.heap;
113 	}
114 
115 	if (mmu->kind_nr) {
116 		struct nvif_mmu_kind_v0 *kind;
117 		size_t argc = struct_size(kind, data, mmu->kind_nr);
118 
119 		if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
120 			goto done;
121 		kind->version = 0;
122 		kind->count = mmu->kind_nr;
123 
124 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
125 				       kind, argc);
126 		if (ret == 0)
127 			memcpy(mmu->kind, kind->data, kind->count);
128 		mmu->kind_inv = kind->kind_inv;
129 		kfree(kind);
130 	}
131 
132 done:
133 	if (ret)
134 		nvif_mmu_dtor(mmu);
135 	return ret;
136 }
137